Journal
JOURNAL OF NATURAL PRODUCTS
Volume 75, Issue 9, Pages 1618-1624Publisher
AMER CHEMICAL SOC
DOI: 10.1021/np300442s
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Funding
- Australian Research Council
- Consiglio Nazionale di Ricerche
- University of Queensland
- Arlo D. Harris Travel Fund
- Francine Kroesen Travel Fund
- University of Queensland's Graduate School Research Travel Fund
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This first chemical study of the sacoglossan mollusk Thuridilla splendens from Mooloolaba, South East Queensland, has resulted in the isolation of three new metabolites, thuridillins D-F (1-3), and one known metabolite, thuridillin A (4). Thuridillin D (1) was isolated by conventional flash chromatography on silica gel, while a mixture of thuridillins E (2) and F (3) was obtained by PTLC on AgNO3-impregnated silica gel. Thuridillins D-F were determined to be structurally related to thuridillin B (5); 1 possessed a hydroxy group at C-11, and 2 and 3 were Delta(10,11) and Delta(11,12)-isomers, respectively. HSQC-HECADE NMR data, together with conformational analysis, NOESY experiments, and H-1-H-1 coupling studies enabled assignment of the individual relative configurations of the epoxylactone, the 2,5-diacetoxy-2,5-dihydrofuran, and cyclohexyl moieties within thuridillin D (1).
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